./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 07:35:02,558 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 07:35:02,673 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/config/svcomp-Reach-32bit-Automizer_Default.epf [2023-11-19 07:35:02,679 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 07:35:02,682 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 07:35:02,730 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 07:35:02,733 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 07:35:02,734 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 07:35:02,735 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 07:35:02,741 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 07:35:02,742 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-19 07:35:02,742 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-19 07:35:02,743 INFO L153 SettingsManager]: * Use SBE=true [2023-11-19 07:35:02,745 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 07:35:02,746 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 07:35:02,746 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 07:35:02,747 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 07:35:02,747 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 07:35:02,765 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 07:35:02,766 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 07:35:02,766 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 07:35:02,767 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 07:35:02,767 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 07:35:02,768 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 07:35:02,768 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 07:35:02,769 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 07:35:02,769 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-19 07:35:02,770 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 07:35:02,770 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:02,770 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 07:35:02,771 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 07:35:02,771 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 07:35:02,772 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-19 07:35:02,772 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 07:35:02,772 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-19 07:35:02,772 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 07:35:02,773 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-19 07:35:02,773 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 07:35:02,773 INFO L153 SettingsManager]: * Independence relation used for large block encoding in concurrent analysis=SYNTACTIC [2023-11-19 07:35:02,774 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 611602be63cf2d0baa947efd80226c155579158ab3e72558e2c6507fec5bab01 [2023-11-19 07:35:03,055 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 07:35:03,095 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 07:35:03,099 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 07:35:03,101 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 07:35:03,101 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 07:35:03,103 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/../../sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-19 07:35:06,358 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 07:35:06,615 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 07:35:06,616 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c [2023-11-19 07:35:06,626 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/data/008933c7e/09056b75e97d4412abaa52395bb6f468/FLAG671b46e90 [2023-11-19 07:35:06,648 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/data/008933c7e/09056b75e97d4412abaa52395bb6f468 [2023-11-19 07:35:06,655 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 07:35:06,659 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 07:35:06,690 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:06,690 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 07:35:06,696 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 07:35:06,699 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,700 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@24403546 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06, skipping insertion in model container [2023-11-19 07:35:06,701 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:06,730 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 07:35:06,928 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[2017,2030] [2023-11-19 07:35:06,933 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:06,947 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 07:35:06,974 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/sv-benchmarks/c/weaver/popl20-figure1.wvr.c[2017,2030] [2023-11-19 07:35:06,975 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 07:35:06,984 WARN L675 CHandler]: The function __VERIFIER_atomic_begin is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:06,985 WARN L675 CHandler]: The function __VERIFIER_atomic_end is called, but not defined or handled by StandardFunctionHandler. [2023-11-19 07:35:06,992 INFO L206 MainTranslator]: Completed translation [2023-11-19 07:35:06,992 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06 WrapperNode [2023-11-19 07:35:06,993 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 07:35:06,994 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:06,994 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 07:35:06,994 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 07:35:07,003 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,011 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,032 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 70 [2023-11-19 07:35:07,033 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 07:35:07,034 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 07:35:07,034 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 07:35:07,034 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 07:35:07,044 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,044 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,047 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,047 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,053 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,056 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,058 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,061 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,063 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 07:35:07,065 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 07:35:07,065 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 07:35:07,065 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 07:35:07,066 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (1/1) ... [2023-11-19 07:35:07,072 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 07:35:07,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:07,101 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 07:35:07,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 07:35:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 07:35:07,147 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2023-11-19 07:35:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2023-11-19 07:35:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2023-11-19 07:35:07,148 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2023-11-19 07:35:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 07:35:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-19 07:35:07,148 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-19 07:35:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2023-11-19 07:35:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2023-11-19 07:35:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 07:35:07,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 07:35:07,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-19 07:35:07,150 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-19 07:35:07,152 WARN L210 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2023-11-19 07:35:07,248 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 07:35:07,251 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 07:35:07,446 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 07:35:07,504 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 07:35:07,505 INFO L302 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-19 07:35:07,509 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:07 BoogieIcfgContainer [2023-11-19 07:35:07,509 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 07:35:07,512 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 07:35:07,512 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 07:35:07,516 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 07:35:07,516 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 07:35:06" (1/3) ... [2023-11-19 07:35:07,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33475889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:07, skipping insertion in model container [2023-11-19 07:35:07,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 07:35:06" (2/3) ... [2023-11-19 07:35:07,517 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33475889 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 07:35:07, skipping insertion in model container [2023-11-19 07:35:07,517 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 07:35:07" (3/3) ... [2023-11-19 07:35:07,519 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-figure1.wvr.c [2023-11-19 07:35:07,528 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2023-11-19 07:35:07,540 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 07:35:07,541 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 07:35:07,541 INFO L514 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2023-11-19 07:35:07,604 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2023-11-19 07:35:07,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 80 places, 78 transitions, 170 flow [2023-11-19 07:35:07,697 INFO L124 PetriNetUnfolderBase]: 5/76 cut-off events. [2023-11-19 07:35:07,698 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:07,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 76 events. 5/76 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/70 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-19 07:35:07,703 INFO L82 GeneralOperation]: Start removeDead. Operand has 80 places, 78 transitions, 170 flow [2023-11-19 07:35:07,708 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 69 places, 67 transitions, 146 flow [2023-11-19 07:35:07,712 INFO L124 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2023-11-19 07:35:07,722 INFO L131 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 69 places, 67 transitions, 146 flow [2023-11-19 07:35:07,726 INFO L113 LiptonReduction]: Starting Lipton reduction on Petri net that has 69 places, 67 transitions, 146 flow [2023-11-19 07:35:07,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 69 places, 67 transitions, 146 flow [2023-11-19 07:35:07,751 INFO L124 PetriNetUnfolderBase]: 5/67 cut-off events. [2023-11-19 07:35:07,752 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:07,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76 conditions, 67 events. 5/67 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 53 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 39. Up to 2 conditions per place. [2023-11-19 07:35:07,754 INFO L119 LiptonReduction]: Number of co-enabled transitions 648 [2023-11-19 07:35:09,820 INFO L134 LiptonReduction]: Checked pairs total: 614 [2023-11-19 07:35:09,820 INFO L136 LiptonReduction]: Total number of compositions: 58 [2023-11-19 07:35:09,845 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 07:35:09,852 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@561b8264, mLbeIndependenceSettings=[IndependenceType=SYNTACTIC, AbstractionType=NONE, UseConditional=, UseSemiCommutativity=, Solver=, SolverTimeout=] [2023-11-19 07:35:09,852 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2023-11-19 07:35:09,858 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2023-11-19 07:35:09,858 INFO L124 PetriNetUnfolderBase]: 2/14 cut-off events. [2023-11-19 07:35:09,859 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2023-11-19 07:35:09,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:09,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:09,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:09,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:09,865 INFO L85 PathProgramCache]: Analyzing trace with hash 609914881, now seen corresponding path program 1 times [2023-11-19 07:35:09,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:09,876 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983562065] [2023-11-19 07:35:09,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:09,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:10,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:10,279 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:10,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:10,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983562065] [2023-11-19 07:35:10,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983562065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:10,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:10,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-19 07:35:10,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389122444] [2023-11-19 07:35:10,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:10,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-19 07:35:10,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:10,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-19 07:35:10,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-19 07:35:10,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 136 [2023-11-19 07:35:10,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 20 places, 15 transitions, 42 flow. Second operand has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:10,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 136 [2023-11-19 07:35:10,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:10,456 INFO L124 PetriNetUnfolderBase]: 60/116 cut-off events. [2023-11-19 07:35:10,456 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2023-11-19 07:35:10,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 256 conditions, 116 events. 60/116 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 304 event pairs, 24 based on Foata normal form. 1/95 useless extension candidates. Maximal degree in co-relation 188. Up to 61 conditions per place. [2023-11-19 07:35:10,461 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 19 selfloop transitions, 2 changer transitions 4/25 dead transitions. [2023-11-19 07:35:10,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 22 places, 25 transitions, 121 flow [2023-11-19 07:35:10,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-19 07:35:10,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2023-11-19 07:35:10,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 228 transitions. [2023-11-19 07:35:10,481 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5588235294117647 [2023-11-19 07:35:10,482 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 228 transitions. [2023-11-19 07:35:10,482 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 228 transitions. [2023-11-19 07:35:10,484 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:10,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 228 transitions. [2023-11-19 07:35:10,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 76.0) internal successors, (228), 3 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,501 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 136.0) internal successors, (544), 4 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,503 INFO L175 Difference]: Start difference. First operand has 20 places, 15 transitions, 42 flow. Second operand 3 states and 228 transitions. [2023-11-19 07:35:10,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 22 places, 25 transitions, 121 flow [2023-11-19 07:35:10,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 18 places, 25 transitions, 107 flow, removed 0 selfloop flow, removed 4 redundant places. [2023-11-19 07:35:10,509 INFO L231 Difference]: Finished difference. Result has 19 places, 16 transitions, 48 flow [2023-11-19 07:35:10,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=34, PETRI_DIFFERENCE_MINUEND_PLACES=16, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=15, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=48, PETRI_PLACES=19, PETRI_TRANSITIONS=16} [2023-11-19 07:35:10,515 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, -1 predicate places. [2023-11-19 07:35:10,515 INFO L495 AbstractCegarLoop]: Abstraction has has 19 places, 16 transitions, 48 flow [2023-11-19 07:35:10,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 71.33333333333333) internal successors, (214), 3 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:10,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:10,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 07:35:10,517 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:10,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:10,527 INFO L85 PathProgramCache]: Analyzing trace with hash -25353225, now seen corresponding path program 1 times [2023-11-19 07:35:10,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:10,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28499782] [2023-11-19 07:35:10,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:10,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:10,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:10,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:10,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:10,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28499782] [2023-11-19 07:35:10,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28499782] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:10,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:10,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:35:10,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392232960] [2023-11-19 07:35:10,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:10,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:10,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:10,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:10,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:35:10,780 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-11-19 07:35:10,781 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 19 places, 16 transitions, 48 flow. Second operand has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,781 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:10,781 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-11-19 07:35:10,781 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:10,861 INFO L124 PetriNetUnfolderBase]: 66/126 cut-off events. [2023-11-19 07:35:10,861 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2023-11-19 07:35:10,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 298 conditions, 126 events. 66/126 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 346 event pairs, 37 based on Foata normal form. 2/128 useless extension candidates. Maximal degree in co-relation 130. Up to 106 conditions per place. [2023-11-19 07:35:10,863 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 19 selfloop transitions, 4 changer transitions 5/28 dead transitions. [2023-11-19 07:35:10,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 23 places, 28 transitions, 132 flow [2023-11-19 07:35:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:35:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:35:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 314 transitions. [2023-11-19 07:35:10,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46176470588235297 [2023-11-19 07:35:10,866 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 314 transitions. [2023-11-19 07:35:10,866 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 314 transitions. [2023-11-19 07:35:10,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:10,867 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 314 transitions. [2023-11-19 07:35:10,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.8) internal successors, (314), 5 states have internal predecessors, (314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,872 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,873 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,873 INFO L175 Difference]: Start difference. First operand has 19 places, 16 transitions, 48 flow. Second operand 5 states and 314 transitions. [2023-11-19 07:35:10,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 23 places, 28 transitions, 132 flow [2023-11-19 07:35:10,874 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 22 places, 28 transitions, 129 flow, removed 0 selfloop flow, removed 1 redundant places. [2023-11-19 07:35:10,875 INFO L231 Difference]: Finished difference. Result has 25 places, 18 transitions, 75 flow [2023-11-19 07:35:10,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=46, PETRI_DIFFERENCE_MINUEND_PLACES=18, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=16, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=13, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=75, PETRI_PLACES=25, PETRI_TRANSITIONS=18} [2023-11-19 07:35:10,876 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 5 predicate places. [2023-11-19 07:35:10,876 INFO L495 AbstractCegarLoop]: Abstraction has has 25 places, 18 transitions, 75 flow [2023-11-19 07:35:10,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:10,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:10,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:10,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 07:35:10,877 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:10,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:10,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1592540017, now seen corresponding path program 2 times [2023-11-19 07:35:10,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:10,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227890301] [2023-11-19 07:35:10,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:10,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:10,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:10,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:10,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:10,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227890301] [2023-11-19 07:35:10,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227890301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:10,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559481717] [2023-11-19 07:35:10,976 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:10,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:10,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:10,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:10,998 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 07:35:11,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:11,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:11,071 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:35:11,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:11,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:11,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559481717] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:11,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:11,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 8 [2023-11-19 07:35:11,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952599841] [2023-11-19 07:35:11,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:11,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:35:11,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:11,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:35:11,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:11,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:11,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 25 places, 18 transitions, 75 flow. Second operand has 8 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:11,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:11,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:11,547 INFO L124 PetriNetUnfolderBase]: 56/105 cut-off events. [2023-11-19 07:35:11,548 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2023-11-19 07:35:11,549 INFO L83 FinitePrefix]: Finished finitePrefix Result has 336 conditions, 105 events. 56/105 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 271 event pairs, 2 based on Foata normal form. 6/111 useless extension candidates. Maximal degree in co-relation 197. Up to 34 conditions per place. [2023-11-19 07:35:11,550 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 32 selfloop transitions, 9 changer transitions 0/41 dead transitions. [2023-11-19 07:35:11,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 30 places, 41 transitions, 231 flow [2023-11-19 07:35:11,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-19 07:35:11,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2023-11-19 07:35:11,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 434 transitions. [2023-11-19 07:35:11,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2023-11-19 07:35:11,553 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 434 transitions. [2023-11-19 07:35:11,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 434 transitions. [2023-11-19 07:35:11,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:11,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 434 transitions. [2023-11-19 07:35:11,556 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 62.0) internal successors, (434), 7 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,560 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 136.0) internal successors, (1088), 8 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,560 INFO L175 Difference]: Start difference. First operand has 25 places, 18 transitions, 75 flow. Second operand 7 states and 434 transitions. [2023-11-19 07:35:11,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 30 places, 41 transitions, 231 flow [2023-11-19 07:35:11,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 27 places, 41 transitions, 215 flow, removed 5 selfloop flow, removed 3 redundant places. [2023-11-19 07:35:11,564 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 117 flow [2023-11-19 07:35:11,565 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=61, PETRI_DIFFERENCE_MINUEND_PLACES=21, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=18, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=12, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=117, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2023-11-19 07:35:11,566 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 9 predicate places. [2023-11-19 07:35:11,566 INFO L495 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 117 flow [2023-11-19 07:35:11,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 58.75) internal successors, (470), 8 states have internal predecessors, (470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:11,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:11,585 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 07:35:11,773 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:11,773 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:11,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:11,774 INFO L85 PathProgramCache]: Analyzing trace with hash 320550285, now seen corresponding path program 3 times [2023-11-19 07:35:11,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:11,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187540085] [2023-11-19 07:35:11,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:11,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:11,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:11,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:11,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187540085] [2023-11-19 07:35:11,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187540085] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:11,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:11,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:35:11,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122515396] [2023-11-19 07:35:11,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:11,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:11,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:11,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:11,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:35:11,958 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 58 out of 136 [2023-11-19 07:35:11,959 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 23 transitions, 117 flow. Second operand has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:11,959 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:11,959 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 58 of 136 [2023-11-19 07:35:11,959 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:12,057 INFO L124 PetriNetUnfolderBase]: 71/136 cut-off events. [2023-11-19 07:35:12,057 INFO L125 PetriNetUnfolderBase]: For 224/224 co-relation queries the response was YES. [2023-11-19 07:35:12,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 501 conditions, 136 events. 71/136 cut-off events. For 224/224 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 368 event pairs, 17 based on Foata normal form. 2/138 useless extension candidates. Maximal degree in co-relation 221. Up to 75 conditions per place. [2023-11-19 07:35:12,060 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 32 selfloop transitions, 8 changer transitions 2/42 dead transitions. [2023-11-19 07:35:12,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 42 transitions, 284 flow [2023-11-19 07:35:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:35:12,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:35:12,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 323 transitions. [2023-11-19 07:35:12,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.475 [2023-11-19 07:35:12,062 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 323 transitions. [2023-11-19 07:35:12,062 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 323 transitions. [2023-11-19 07:35:12,063 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:12,063 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 323 transitions. [2023-11-19 07:35:12,064 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,066 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,067 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,067 INFO L175 Difference]: Start difference. First operand has 29 places, 23 transitions, 117 flow. Second operand 5 states and 323 transitions. [2023-11-19 07:35:12,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 42 transitions, 284 flow [2023-11-19 07:35:12,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 42 transitions, 248 flow, removed 11 selfloop flow, removed 2 redundant places. [2023-11-19 07:35:12,072 INFO L231 Difference]: Finished difference. Result has 34 places, 25 transitions, 142 flow [2023-11-19 07:35:12,072 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=93, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=15, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=142, PETRI_PLACES=34, PETRI_TRANSITIONS=25} [2023-11-19 07:35:12,073 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 14 predicate places. [2023-11-19 07:35:12,073 INFO L495 AbstractCegarLoop]: Abstraction has has 34 places, 25 transitions, 142 flow [2023-11-19 07:35:12,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 60.8) internal successors, (304), 5 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:12,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:12,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 07:35:12,074 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:12,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:12,075 INFO L85 PathProgramCache]: Analyzing trace with hash 713779317, now seen corresponding path program 4 times [2023-11-19 07:35:12,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:12,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569288106] [2023-11-19 07:35:12,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:12,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:12,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:12,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:12,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569288106] [2023-11-19 07:35:12,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569288106] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876330491] [2023-11-19 07:35:12,175 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:35:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:12,176 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:12,177 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:12,196 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 07:35:12,246 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:35:12,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:12,247 INFO L262 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:35:12,248 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:12,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:12,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:12,350 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:12,350 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876330491] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:12,350 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:12,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:35:12,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727149031] [2023-11-19 07:35:12,351 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:12,351 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:35:12,351 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:12,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:35:12,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:35:12,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:12,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 25 transitions, 142 flow. Second operand has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:12,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:12,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:12,549 INFO L124 PetriNetUnfolderBase]: 86/161 cut-off events. [2023-11-19 07:35:12,549 INFO L125 PetriNetUnfolderBase]: For 493/493 co-relation queries the response was YES. [2023-11-19 07:35:12,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 642 conditions, 161 events. 86/161 cut-off events. For 493/493 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 485 event pairs, 14 based on Foata normal form. 6/167 useless extension candidates. Maximal degree in co-relation 235. Up to 82 conditions per place. [2023-11-19 07:35:12,553 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 40 selfloop transitions, 15 changer transitions 0/55 dead transitions. [2023-11-19 07:35:12,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 55 transitions, 403 flow [2023-11-19 07:35:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:35:12,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:35:12,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 611 transitions. [2023-11-19 07:35:12,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44926470588235295 [2023-11-19 07:35:12,557 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 611 transitions. [2023-11-19 07:35:12,557 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 611 transitions. [2023-11-19 07:35:12,557 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:12,558 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 611 transitions. [2023-11-19 07:35:12,560 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.1) internal successors, (611), 10 states have internal predecessors, (611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,564 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,565 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,565 INFO L175 Difference]: Start difference. First operand has 34 places, 25 transitions, 142 flow. Second operand 10 states and 611 transitions. [2023-11-19 07:35:12,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 55 transitions, 403 flow [2023-11-19 07:35:12,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 55 transitions, 365 flow, removed 13 selfloop flow, removed 2 redundant places. [2023-11-19 07:35:12,570 INFO L231 Difference]: Finished difference. Result has 44 places, 32 transitions, 220 flow [2023-11-19 07:35:12,571 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=123, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=25, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=14, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=220, PETRI_PLACES=44, PETRI_TRANSITIONS=32} [2023-11-19 07:35:12,573 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-19 07:35:12,577 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 32 transitions, 220 flow [2023-11-19 07:35:12,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 59.0) internal successors, (590), 10 states have internal predecessors, (590), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:12,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:12,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:12,605 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:12,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:12,801 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:12,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:12,801 INFO L85 PathProgramCache]: Analyzing trace with hash -1687016819, now seen corresponding path program 5 times [2023-11-19 07:35:12,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:12,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373071305] [2023-11-19 07:35:12,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:12,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:12,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:12,919 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:12,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373071305] [2023-11-19 07:35:12,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373071305] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:12,920 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153579079] [2023-11-19 07:35:12,920 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:35:12,920 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:12,921 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:12,922 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:12,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-19 07:35:12,999 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:12,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:13,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-19 07:35:13,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:13,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:13,060 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:13,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:13,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153579079] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:13,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:13,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2023-11-19 07:35:13,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697028412] [2023-11-19 07:35:13,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:13,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:35:13,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:13,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:35:13,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:35:13,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:13,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 32 transitions, 220 flow. Second operand has 10 states, 10 states have (on average 58.5) internal successors, (585), 10 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:13,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:13,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:13,296 INFO L124 PetriNetUnfolderBase]: 80/155 cut-off events. [2023-11-19 07:35:13,297 INFO L125 PetriNetUnfolderBase]: For 539/539 co-relation queries the response was YES. [2023-11-19 07:35:13,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 647 conditions, 155 events. 80/155 cut-off events. For 539/539 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 448 event pairs, 21 based on Foata normal form. 6/161 useless extension candidates. Maximal degree in co-relation 573. Up to 105 conditions per place. [2023-11-19 07:35:13,299 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 30 selfloop transitions, 16 changer transitions 1/47 dead transitions. [2023-11-19 07:35:13,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 47 transitions, 393 flow [2023-11-19 07:35:13,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:13,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:35:13,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 372 transitions. [2023-11-19 07:35:13,303 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2023-11-19 07:35:13,303 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 372 transitions. [2023-11-19 07:35:13,303 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 372 transitions. [2023-11-19 07:35:13,303 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:13,304 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 372 transitions. [2023-11-19 07:35:13,305 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 62.0) internal successors, (372), 6 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,308 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,308 INFO L175 Difference]: Start difference. First operand has 44 places, 32 transitions, 220 flow. Second operand 6 states and 372 transitions. [2023-11-19 07:35:13,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 47 transitions, 393 flow [2023-11-19 07:35:13,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 47 transitions, 347 flow, removed 9 selfloop flow, removed 5 redundant places. [2023-11-19 07:35:13,314 INFO L231 Difference]: Finished difference. Result has 47 places, 36 transitions, 262 flow [2023-11-19 07:35:13,314 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=262, PETRI_PLACES=47, PETRI_TRANSITIONS=36} [2023-11-19 07:35:13,315 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 27 predicate places. [2023-11-19 07:35:13,315 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 36 transitions, 262 flow [2023-11-19 07:35:13,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 58.5) internal successors, (585), 10 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:13,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:13,336 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:13,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:13,537 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:13,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:13,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1644445039, now seen corresponding path program 6 times [2023-11-19 07:35:13,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:13,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799967297] [2023-11-19 07:35:13,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:13,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:13,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:13,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:13,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:13,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799967297] [2023-11-19 07:35:13,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799967297] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:13,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 07:35:13,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 07:35:13,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753092329] [2023-11-19 07:35:13,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:13,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:13,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:13,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:13,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-19 07:35:13,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 57 out of 136 [2023-11-19 07:35:13,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 36 transitions, 262 flow. Second operand has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:13,677 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 57 of 136 [2023-11-19 07:35:13,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:13,747 INFO L124 PetriNetUnfolderBase]: 75/140 cut-off events. [2023-11-19 07:35:13,747 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2023-11-19 07:35:13,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 612 conditions, 140 events. 75/140 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 368 event pairs, 17 based on Foata normal form. 2/142 useless extension candidates. Maximal degree in co-relation 523. Up to 87 conditions per place. [2023-11-19 07:35:13,750 INFO L140 encePairwiseOnDemand]: 131/136 looper letters, 26 selfloop transitions, 14 changer transitions 2/42 dead transitions. [2023-11-19 07:35:13,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 42 transitions, 363 flow [2023-11-19 07:35:13,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:35:13,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:35:13,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 312 transitions. [2023-11-19 07:35:13,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4588235294117647 [2023-11-19 07:35:13,752 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 312 transitions. [2023-11-19 07:35:13,752 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 312 transitions. [2023-11-19 07:35:13,753 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:13,753 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 312 transitions. [2023-11-19 07:35:13,754 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 62.4) internal successors, (312), 5 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,756 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,757 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,757 INFO L175 Difference]: Start difference. First operand has 47 places, 36 transitions, 262 flow. Second operand 5 states and 312 transitions. [2023-11-19 07:35:13,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 42 transitions, 363 flow [2023-11-19 07:35:13,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 287 flow, removed 17 selfloop flow, removed 7 redundant places. [2023-11-19 07:35:13,761 INFO L231 Difference]: Finished difference. Result has 45 places, 35 transitions, 210 flow [2023-11-19 07:35:13,762 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=210, PETRI_PLACES=45, PETRI_TRANSITIONS=35} [2023-11-19 07:35:13,762 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 25 predicate places. [2023-11-19 07:35:13,763 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 35 transitions, 210 flow [2023-11-19 07:35:13,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 59.8) internal successors, (299), 5 states have internal predecessors, (299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:13,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:13,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 07:35:13,764 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:13,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:13,764 INFO L85 PathProgramCache]: Analyzing trace with hash 977655432, now seen corresponding path program 1 times [2023-11-19 07:35:13,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:13,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131503607] [2023-11-19 07:35:13,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:13,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:13,847 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:13,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131503607] [2023-11-19 07:35:13,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131503607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:13,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629092445] [2023-11-19 07:35:13,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:13,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:13,849 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:13,850 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:13,870 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-19 07:35:13,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:13,924 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:13,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:13,961 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:13,961 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-19 07:35:13,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629092445] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 07:35:13,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-19 07:35:13,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [2] total 4 [2023-11-19 07:35:13,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722556268] [2023-11-19 07:35:13,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 07:35:13,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 07:35:13,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:13,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 07:35:13,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-19 07:35:13,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 136 [2023-11-19 07:35:13,970 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 210 flow. Second operand has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:13,970 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:13,970 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 136 [2023-11-19 07:35:13,970 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:14,060 INFO L124 PetriNetUnfolderBase]: 136/254 cut-off events. [2023-11-19 07:35:14,060 INFO L125 PetriNetUnfolderBase]: For 421/421 co-relation queries the response was YES. [2023-11-19 07:35:14,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 956 conditions, 254 events. 136/254 cut-off events. For 421/421 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 870 event pairs, 18 based on Foata normal form. 7/261 useless extension candidates. Maximal degree in co-relation 827. Up to 123 conditions per place. [2023-11-19 07:35:14,063 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 45 selfloop transitions, 11 changer transitions 11/67 dead transitions. [2023-11-19 07:35:14,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 67 transitions, 504 flow [2023-11-19 07:35:14,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 07:35:14,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2023-11-19 07:35:14,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 307 transitions. [2023-11-19 07:35:14,065 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5643382352941176 [2023-11-19 07:35:14,066 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 307 transitions. [2023-11-19 07:35:14,066 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 307 transitions. [2023-11-19 07:35:14,066 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:14,066 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 307 transitions. [2023-11-19 07:35:14,067 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 76.75) internal successors, (307), 4 states have internal predecessors, (307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,069 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,069 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 136.0) internal successors, (680), 5 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,070 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 210 flow. Second operand 4 states and 307 transitions. [2023-11-19 07:35:14,070 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 67 transitions, 504 flow [2023-11-19 07:35:14,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 67 transitions, 458 flow, removed 1 selfloop flow, removed 4 redundant places. [2023-11-19 07:35:14,074 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 282 flow [2023-11-19 07:35:14,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=180, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=282, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2023-11-19 07:35:14,075 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 24 predicate places. [2023-11-19 07:35:14,076 INFO L495 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 282 flow [2023-11-19 07:35:14,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 70.0) internal successors, (350), 5 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:14,076 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:14,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:14,297 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:14,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1419209280, now seen corresponding path program 2 times [2023-11-19 07:35:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:14,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820232960] [2023-11-19 07:35:14,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:14,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:14,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:14,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:14,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820232960] [2023-11-19 07:35:14,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820232960] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:14,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558441383] [2023-11-19 07:35:14,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:14,397 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:14,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:14,418 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:14,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-19 07:35:14,506 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:14,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:14,508 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:14,509 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:14,583 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:14,583 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:14,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:14,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558441383] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:14,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:14,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-19 07:35:14,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832732559] [2023-11-19 07:35:14,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:14,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:35:14,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:14,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:35:14,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=91, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:35:14,711 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:14,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 282 flow. Second operand has 12 states, 12 states have (on average 58.25) internal successors, (699), 12 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:14,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:14,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:14,968 INFO L124 PetriNetUnfolderBase]: 182/328 cut-off events. [2023-11-19 07:35:14,969 INFO L125 PetriNetUnfolderBase]: For 635/635 co-relation queries the response was YES. [2023-11-19 07:35:14,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1368 conditions, 328 events. 182/328 cut-off events. For 635/635 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1185 event pairs, 34 based on Foata normal form. 12/340 useless extension candidates. Maximal degree in co-relation 1239. Up to 169 conditions per place. [2023-11-19 07:35:14,973 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 49 selfloop transitions, 37 changer transitions 1/87 dead transitions. [2023-11-19 07:35:14,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 741 flow [2023-11-19 07:35:14,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:35:14,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:35:14,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 790 transitions. [2023-11-19 07:35:14,977 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4468325791855204 [2023-11-19 07:35:14,978 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 790 transitions. [2023-11-19 07:35:14,978 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 790 transitions. [2023-11-19 07:35:14,979 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:14,979 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 790 transitions. [2023-11-19 07:35:14,981 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 60.76923076923077) internal successors, (790), 13 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,986 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,987 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,987 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 282 flow. Second operand 13 states and 790 transitions. [2023-11-19 07:35:14,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 741 flow [2023-11-19 07:35:14,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 87 transitions, 715 flow, removed 13 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:14,993 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 571 flow [2023-11-19 07:35:14,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=571, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2023-11-19 07:35:14,995 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 40 predicate places. [2023-11-19 07:35:14,995 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 571 flow [2023-11-19 07:35:14,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 58.25) internal successors, (699), 12 states have internal predecessors, (699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:14,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:14,996 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:15,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:15,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:15,209 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:15,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:15,209 INFO L85 PathProgramCache]: Analyzing trace with hash -633942268, now seen corresponding path program 3 times [2023-11-19 07:35:15,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:15,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100504537] [2023-11-19 07:35:15,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:15,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:15,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:15,306 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:15,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:15,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100504537] [2023-11-19 07:35:15,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100504537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:15,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496037402] [2023-11-19 07:35:15,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:35:15,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:15,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:15,309 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:15,320 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-19 07:35:15,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-19 07:35:15,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:15,385 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:15,386 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:15,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:15,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:15,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496037402] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:15,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:15,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 11 [2023-11-19 07:35:15,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685457998] [2023-11-19 07:35:15,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:15,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-19 07:35:15,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:15,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-19 07:35:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2023-11-19 07:35:15,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:15,554 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 571 flow. Second operand has 11 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:15,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:15,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:15,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:15,839 INFO L124 PetriNetUnfolderBase]: 209/382 cut-off events. [2023-11-19 07:35:15,839 INFO L125 PetriNetUnfolderBase]: For 1116/1116 co-relation queries the response was YES. [2023-11-19 07:35:15,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1907 conditions, 382 events. 209/382 cut-off events. For 1116/1116 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1471 event pairs, 17 based on Foata normal form. 8/390 useless extension candidates. Maximal degree in co-relation 1758. Up to 122 conditions per place. [2023-11-19 07:35:15,845 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 67 selfloop transitions, 32 changer transitions 12/111 dead transitions. [2023-11-19 07:35:15,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 111 transitions, 1093 flow [2023-11-19 07:35:15,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-19 07:35:15,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2023-11-19 07:35:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 620 transitions. [2023-11-19 07:35:15,848 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45588235294117646 [2023-11-19 07:35:15,849 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 620 transitions. [2023-11-19 07:35:15,849 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 620 transitions. [2023-11-19 07:35:15,849 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:15,850 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 620 transitions. [2023-11-19 07:35:15,852 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 62.0) internal successors, (620), 10 states have internal predecessors, (620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:15,855 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:15,856 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 136.0) internal successors, (1496), 11 states have internal predecessors, (1496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:15,856 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 571 flow. Second operand 10 states and 620 transitions. [2023-11-19 07:35:15,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 111 transitions, 1093 flow [2023-11-19 07:35:15,867 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 111 transitions, 897 flow, removed 74 selfloop flow, removed 6 redundant places. [2023-11-19 07:35:15,870 INFO L231 Difference]: Finished difference. Result has 69 places, 75 transitions, 651 flow [2023-11-19 07:35:15,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=651, PETRI_PLACES=69, PETRI_TRANSITIONS=75} [2023-11-19 07:35:15,871 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 49 predicate places. [2023-11-19 07:35:15,871 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 75 transitions, 651 flow [2023-11-19 07:35:15,872 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 58.36363636363637) internal successors, (642), 11 states have internal predecessors, (642), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:15,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:15,872 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:15,899 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:16,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-19 07:35:16,094 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:16,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:16,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1259477914, now seen corresponding path program 4 times [2023-11-19 07:35:16,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:16,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765758676] [2023-11-19 07:35:16,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:16,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:16,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:16,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:16,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:16,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765758676] [2023-11-19 07:35:16,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765758676] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:16,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863300207] [2023-11-19 07:35:16,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:35:16,211 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:16,211 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:16,212 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:16,221 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-19 07:35:16,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:35:16,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:16,284 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:16,286 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:16,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:16,369 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:16,428 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:16,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863300207] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:16,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:16,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 13 [2023-11-19 07:35:16,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168357488] [2023-11-19 07:35:16,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:16,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:35:16,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:16,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:35:16,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:35:16,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:16,512 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 75 transitions, 651 flow. Second operand has 13 states, 13 states have (on average 58.15384615384615) internal successors, (756), 13 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:16,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:16,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:16,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:16,868 INFO L124 PetriNetUnfolderBase]: 244/426 cut-off events. [2023-11-19 07:35:16,868 INFO L125 PetriNetUnfolderBase]: For 1609/1609 co-relation queries the response was YES. [2023-11-19 07:35:16,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2254 conditions, 426 events. 244/426 cut-off events. For 1609/1609 co-relation queries the response was YES. Maximal size of possible extension queue 34. Compared 1584 event pairs, 26 based on Foata normal form. 22/448 useless extension candidates. Maximal degree in co-relation 1983. Up to 162 conditions per place. [2023-11-19 07:35:16,876 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 74 selfloop transitions, 52 changer transitions 0/126 dead transitions. [2023-11-19 07:35:16,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 126 transitions, 1241 flow [2023-11-19 07:35:16,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-19 07:35:16,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2023-11-19 07:35:16,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 857 transitions. [2023-11-19 07:35:16,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45010504201680673 [2023-11-19 07:35:16,881 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 857 transitions. [2023-11-19 07:35:16,881 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 857 transitions. [2023-11-19 07:35:16,882 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:16,882 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 857 transitions. [2023-11-19 07:35:16,885 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 61.214285714285715) internal successors, (857), 14 states have internal predecessors, (857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:16,889 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 136.0) internal successors, (2040), 15 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:16,890 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 136.0) internal successors, (2040), 15 states have internal predecessors, (2040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:16,891 INFO L175 Difference]: Start difference. First operand has 69 places, 75 transitions, 651 flow. Second operand 14 states and 857 transitions. [2023-11-19 07:35:16,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 126 transitions, 1241 flow [2023-11-19 07:35:16,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 126 transitions, 1167 flow, removed 30 selfloop flow, removed 3 redundant places. [2023-11-19 07:35:16,905 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 989 flow [2023-11-19 07:35:16,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=607, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=989, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2023-11-19 07:35:16,906 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 66 predicate places. [2023-11-19 07:35:16,906 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 989 flow [2023-11-19 07:35:16,907 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 58.15384615384615) internal successors, (756), 13 states have internal predecessors, (756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:16,907 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:16,907 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:16,933 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:17,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:17,128 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:17,128 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:17,128 INFO L85 PathProgramCache]: Analyzing trace with hash 92968108, now seen corresponding path program 5 times [2023-11-19 07:35:17,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:17,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782792767] [2023-11-19 07:35:17,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:17,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:17,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:17,219 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:17,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:17,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782792767] [2023-11-19 07:35:17,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782792767] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:17,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690773715] [2023-11-19 07:35:17,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:35:17,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:17,220 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:17,221 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:17,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-19 07:35:17,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:17,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:17,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:17,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:17,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:17,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:17,438 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:17,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690773715] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:17,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:17,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 12 [2023-11-19 07:35:17,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116282337] [2023-11-19 07:35:17,439 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:17,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2023-11-19 07:35:17,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:17,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2023-11-19 07:35:17,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2023-11-19 07:35:17,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:17,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 989 flow. Second operand has 12 states, 12 states have (on average 58.333333333333336) internal successors, (700), 12 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:17,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:17,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:17,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:17,936 INFO L124 PetriNetUnfolderBase]: 247/455 cut-off events. [2023-11-19 07:35:17,936 INFO L125 PetriNetUnfolderBase]: For 2846/2846 co-relation queries the response was YES. [2023-11-19 07:35:17,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2577 conditions, 455 events. 247/455 cut-off events. For 2846/2846 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 1844 event pairs, 24 based on Foata normal form. 26/481 useless extension candidates. Maximal degree in co-relation 2334. Up to 175 conditions per place. [2023-11-19 07:35:17,945 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 58 selfloop transitions, 72 changer transitions 1/131 dead transitions. [2023-11-19 07:35:17,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 131 transitions, 1463 flow [2023-11-19 07:35:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:35:17,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:35:17,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 974 transitions. [2023-11-19 07:35:17,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4476102941176471 [2023-11-19 07:35:17,950 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 974 transitions. [2023-11-19 07:35:17,951 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 974 transitions. [2023-11-19 07:35:17,952 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:17,952 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 974 transitions. [2023-11-19 07:35:17,955 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 60.875) internal successors, (974), 16 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:17,960 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:17,962 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:17,962 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 989 flow. Second operand 16 states and 974 transitions. [2023-11-19 07:35:17,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 131 transitions, 1463 flow [2023-11-19 07:35:17,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 131 transitions, 1313 flow, removed 61 selfloop flow, removed 6 redundant places. [2023-11-19 07:35:17,984 INFO L231 Difference]: Finished difference. Result has 98 places, 102 transitions, 1100 flow [2023-11-19 07:35:17,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=854, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=1100, PETRI_PLACES=98, PETRI_TRANSITIONS=102} [2023-11-19 07:35:17,985 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 78 predicate places. [2023-11-19 07:35:17,985 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 102 transitions, 1100 flow [2023-11-19 07:35:17,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 58.333333333333336) internal successors, (700), 12 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:17,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:17,986 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:18,012 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:18,201 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:18,201 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:18,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:18,201 INFO L85 PathProgramCache]: Analyzing trace with hash 2003194186, now seen corresponding path program 6 times [2023-11-19 07:35:18,201 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:18,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170581277] [2023-11-19 07:35:18,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:18,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:18,294 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:18,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:18,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170581277] [2023-11-19 07:35:18,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170581277] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:18,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946447129] [2023-11-19 07:35:18,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:35:18,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:18,296 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:18,297 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:18,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-19 07:35:18,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2023-11-19 07:35:18,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:18,377 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:18,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:18,465 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:18,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:18,520 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:18,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946447129] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:18,521 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:18,521 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:35:18,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438894061] [2023-11-19 07:35:18,522 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:18,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:18,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:18,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:18,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:18,610 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:18,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 102 transitions, 1100 flow. Second operand has 15 states, 15 states have (on average 58.06666666666667) internal successors, (871), 15 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:18,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:18,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:18,612 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:19,158 INFO L124 PetriNetUnfolderBase]: 396/722 cut-off events. [2023-11-19 07:35:19,158 INFO L125 PetriNetUnfolderBase]: For 4247/4247 co-relation queries the response was YES. [2023-11-19 07:35:19,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4231 conditions, 722 events. 396/722 cut-off events. For 4247/4247 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 3388 event pairs, 28 based on Foata normal form. 10/732 useless extension candidates. Maximal degree in co-relation 3885. Up to 237 conditions per place. [2023-11-19 07:35:19,171 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 86 selfloop transitions, 120 changer transitions 1/207 dead transitions. [2023-11-19 07:35:19,171 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 207 transitions, 2452 flow [2023-11-19 07:35:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-19 07:35:19,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 23 states. [2023-11-19 07:35:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 1391 transitions. [2023-11-19 07:35:19,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.444693094629156 [2023-11-19 07:35:19,178 INFO L72 ComplementDD]: Start complementDD. Operand 23 states and 1391 transitions. [2023-11-19 07:35:19,178 INFO L73 IsDeterministic]: Start isDeterministic. Operand 23 states and 1391 transitions. [2023-11-19 07:35:19,180 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:19,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 23 states and 1391 transitions. [2023-11-19 07:35:19,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 24 states, 23 states have (on average 60.47826086956522) internal successors, (1391), 23 states have internal predecessors, (1391), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,193 INFO L81 ComplementDD]: Finished complementDD. Result has 24 states, 24 states have (on average 136.0) internal successors, (3264), 24 states have internal predecessors, (3264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,194 INFO L175 Difference]: Start difference. First operand has 98 places, 102 transitions, 1100 flow. Second operand 23 states and 1391 transitions. [2023-11-19 07:35:19,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 207 transitions, 2452 flow [2023-11-19 07:35:19,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 207 transitions, 2200 flow, removed 41 selfloop flow, removed 11 redundant places. [2023-11-19 07:35:19,224 INFO L231 Difference]: Finished difference. Result has 115 places, 165 transitions, 2024 flow [2023-11-19 07:35:19,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=965, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=23, PETRI_FLOW=2024, PETRI_PLACES=115, PETRI_TRANSITIONS=165} [2023-11-19 07:35:19,225 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 95 predicate places. [2023-11-19 07:35:19,225 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 165 transitions, 2024 flow [2023-11-19 07:35:19,226 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.06666666666667) internal successors, (871), 15 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,226 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:19,226 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:19,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:19,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:19,441 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:19,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:19,441 INFO L85 PathProgramCache]: Analyzing trace with hash -368360718, now seen corresponding path program 7 times [2023-11-19 07:35:19,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:19,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945429155] [2023-11-19 07:35:19,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:19,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:19,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945429155] [2023-11-19 07:35:19,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945429155] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:19,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1336368512] [2023-11-19 07:35:19,549 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:35:19,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:19,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:19,551 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:19,577 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-19 07:35:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:19,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:19,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:19,687 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:19,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:19,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1336368512] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:19,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:19,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 15 [2023-11-19 07:35:19,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302588735] [2023-11-19 07:35:19,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:19,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:19,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:19,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:19,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:19,805 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:19,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 165 transitions, 2024 flow. Second operand has 15 states, 15 states have (on average 57.733333333333334) internal successors, (866), 15 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:19,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:19,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:19,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:20,296 INFO L124 PetriNetUnfolderBase]: 438/790 cut-off events. [2023-11-19 07:35:20,296 INFO L125 PetriNetUnfolderBase]: For 6371/6371 co-relation queries the response was YES. [2023-11-19 07:35:20,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5172 conditions, 790 events. 438/790 cut-off events. For 6371/6371 co-relation queries the response was YES. Maximal size of possible extension queue 69. Compared 3696 event pairs, 95 based on Foata normal form. 34/824 useless extension candidates. Maximal degree in co-relation 4779. Up to 620 conditions per place. [2023-11-19 07:35:20,311 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 171 selfloop transitions, 54 changer transitions 0/225 dead transitions. [2023-11-19 07:35:20,311 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 225 transitions, 3053 flow [2023-11-19 07:35:20,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-19 07:35:20,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2023-11-19 07:35:20,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 1098 transitions. [2023-11-19 07:35:20,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4485294117647059 [2023-11-19 07:35:20,316 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 1098 transitions. [2023-11-19 07:35:20,316 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 1098 transitions. [2023-11-19 07:35:20,320 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:20,321 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 1098 transitions. [2023-11-19 07:35:20,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 61.0) internal successors, (1098), 18 states have internal predecessors, (1098), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:20,331 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:20,332 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 136.0) internal successors, (2584), 19 states have internal predecessors, (2584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:20,332 INFO L175 Difference]: Start difference. First operand has 115 places, 165 transitions, 2024 flow. Second operand 18 states and 1098 transitions. [2023-11-19 07:35:20,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 225 transitions, 3053 flow [2023-11-19 07:35:20,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 225 transitions, 2895 flow, removed 54 selfloop flow, removed 8 redundant places. [2023-11-19 07:35:20,381 INFO L231 Difference]: Finished difference. Result has 136 places, 193 transitions, 2504 flow [2023-11-19 07:35:20,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=1866, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=2504, PETRI_PLACES=136, PETRI_TRANSITIONS=193} [2023-11-19 07:35:20,383 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 116 predicate places. [2023-11-19 07:35:20,383 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 193 transitions, 2504 flow [2023-11-19 07:35:20,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.733333333333334) internal successors, (866), 15 states have internal predecessors, (866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:20,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:20,384 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:20,405 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:20,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:20,597 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:20,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:20,597 INFO L85 PathProgramCache]: Analyzing trace with hash 1346415112, now seen corresponding path program 8 times [2023-11-19 07:35:20,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:20,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981189694] [2023-11-19 07:35:20,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:20,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:20,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:20,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981189694] [2023-11-19 07:35:20,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981189694] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:20,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46892996] [2023-11-19 07:35:20,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:20,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:20,721 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:20,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-19 07:35:20,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:20,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:20,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-19 07:35:20,807 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:20,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:20,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:20,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46892996] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:20,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:20,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2023-11-19 07:35:20,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793037548] [2023-11-19 07:35:20,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:20,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-19 07:35:20,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:20,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-19 07:35:20,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2023-11-19 07:35:21,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:21,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 193 transitions, 2504 flow. Second operand has 13 states, 13 states have (on average 57.92307692307692) internal successors, (753), 13 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:21,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:21,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:21,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:21,326 INFO L124 PetriNetUnfolderBase]: 443/793 cut-off events. [2023-11-19 07:35:21,326 INFO L125 PetriNetUnfolderBase]: For 8871/8871 co-relation queries the response was YES. [2023-11-19 07:35:21,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5558 conditions, 793 events. 443/793 cut-off events. For 8871/8871 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 3695 event pairs, 98 based on Foata normal form. 6/799 useless extension candidates. Maximal degree in co-relation 5302. Up to 645 conditions per place. [2023-11-19 07:35:21,342 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 160 selfloop transitions, 50 changer transitions 3/213 dead transitions. [2023-11-19 07:35:21,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 213 transitions, 3164 flow [2023-11-19 07:35:21,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-19 07:35:21,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2023-11-19 07:35:21,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 667 transitions. [2023-11-19 07:35:21,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44585561497326204 [2023-11-19 07:35:21,345 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 667 transitions. [2023-11-19 07:35:21,345 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 667 transitions. [2023-11-19 07:35:21,346 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:21,346 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 667 transitions. [2023-11-19 07:35:21,348 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 60.63636363636363) internal successors, (667), 11 states have internal predecessors, (667), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:21,352 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:21,353 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 136.0) internal successors, (1632), 12 states have internal predecessors, (1632), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:21,353 INFO L175 Difference]: Start difference. First operand has 136 places, 193 transitions, 2504 flow. Second operand 11 states and 667 transitions. [2023-11-19 07:35:21,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 213 transitions, 3164 flow [2023-11-19 07:35:21,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 213 transitions, 2790 flow, removed 171 selfloop flow, removed 5 redundant places. [2023-11-19 07:35:21,421 INFO L231 Difference]: Finished difference. Result has 142 places, 195 transitions, 2290 flow [2023-11-19 07:35:21,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2290, PETRI_PLACES=142, PETRI_TRANSITIONS=195} [2023-11-19 07:35:21,422 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 122 predicate places. [2023-11-19 07:35:21,422 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 195 transitions, 2290 flow [2023-11-19 07:35:21,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 57.92307692307692) internal successors, (753), 13 states have internal predecessors, (753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:21,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:21,423 INFO L208 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:21,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:21,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-19 07:35:21,624 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:21,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:21,624 INFO L85 PathProgramCache]: Analyzing trace with hash 1016104605, now seen corresponding path program 9 times [2023-11-19 07:35:21,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:21,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878176331] [2023-11-19 07:35:21,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:21,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:21,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:21,736 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:21,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:21,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878176331] [2023-11-19 07:35:21,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878176331] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:21,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724568191] [2023-11-19 07:35:21,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:35:21,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:21,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:21,738 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:21,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-19 07:35:21,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-19 07:35:21,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:21,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:21,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:21,869 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:21,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:21,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:21,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724568191] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:21,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:21,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 6 [2023-11-19 07:35:21,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168187943] [2023-11-19 07:35:21,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:21,921 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-19 07:35:21,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:21,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-19 07:35:21,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-19 07:35:21,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 136 [2023-11-19 07:35:21,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 195 transitions, 2290 flow. Second operand has 8 states, 8 states have (on average 70.5) internal successors, (564), 8 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:21,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:21,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 136 [2023-11-19 07:35:21,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:22,329 INFO L124 PetriNetUnfolderBase]: 669/1192 cut-off events. [2023-11-19 07:35:22,329 INFO L125 PetriNetUnfolderBase]: For 11881/11881 co-relation queries the response was YES. [2023-11-19 07:35:22,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8029 conditions, 1192 events. 669/1192 cut-off events. For 11881/11881 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 6179 event pairs, 36 based on Foata normal form. 7/1199 useless extension candidates. Maximal degree in co-relation 7617. Up to 630 conditions per place. [2023-11-19 07:35:22,352 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 200 selfloop transitions, 81 changer transitions 48/329 dead transitions. [2023-11-19 07:35:22,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 329 transitions, 4446 flow [2023-11-19 07:35:22,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 07:35:22,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2023-11-19 07:35:22,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 386 transitions. [2023-11-19 07:35:22,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5676470588235294 [2023-11-19 07:35:22,354 INFO L72 ComplementDD]: Start complementDD. Operand 5 states and 386 transitions. [2023-11-19 07:35:22,354 INFO L73 IsDeterministic]: Start isDeterministic. Operand 5 states and 386 transitions. [2023-11-19 07:35:22,355 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:22,355 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 5 states and 386 transitions. [2023-11-19 07:35:22,356 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 6 states, 5 states have (on average 77.2) internal successors, (386), 5 states have internal predecessors, (386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:22,357 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:22,358 INFO L81 ComplementDD]: Finished complementDD. Result has 6 states, 6 states have (on average 136.0) internal successors, (816), 6 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:22,358 INFO L175 Difference]: Start difference. First operand has 142 places, 195 transitions, 2290 flow. Second operand 5 states and 386 transitions. [2023-11-19 07:35:22,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 329 transitions, 4446 flow [2023-11-19 07:35:22,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 329 transitions, 4347 flow, removed 4 selfloop flow, removed 4 redundant places. [2023-11-19 07:35:22,436 INFO L231 Difference]: Finished difference. Result has 144 places, 241 transitions, 3107 flow [2023-11-19 07:35:22,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3107, PETRI_PLACES=144, PETRI_TRANSITIONS=241} [2023-11-19 07:35:22,437 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 124 predicate places. [2023-11-19 07:35:22,437 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 241 transitions, 3107 flow [2023-11-19 07:35:22,438 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 70.5) internal successors, (564), 8 states have internal predecessors, (564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:22,438 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:22,438 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:22,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-19 07:35:22,664 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:22,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:22,664 INFO L85 PathProgramCache]: Analyzing trace with hash 268416117, now seen corresponding path program 10 times [2023-11-19 07:35:22,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:22,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185751415] [2023-11-19 07:35:22,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:22,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:22,770 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:22,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185751415] [2023-11-19 07:35:22,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185751415] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:22,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204877411] [2023-11-19 07:35:22,771 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:35:22,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:22,771 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:22,772 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:22,792 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-19 07:35:22,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:35:22,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:22,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:22,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:22,905 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:22,905 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:22,969 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204877411] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:22,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:22,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 14 [2023-11-19 07:35:22,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624178328] [2023-11-19 07:35:22,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:22,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-19 07:35:22,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:22,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-19 07:35:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-19 07:35:23,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:23,042 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 241 transitions, 3107 flow. Second operand has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:23,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:23,043 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:23,043 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:23,681 INFO L124 PetriNetUnfolderBase]: 775/1418 cut-off events. [2023-11-19 07:35:23,682 INFO L125 PetriNetUnfolderBase]: For 17208/17208 co-relation queries the response was YES. [2023-11-19 07:35:23,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10322 conditions, 1418 events. 775/1418 cut-off events. For 17208/17208 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 7887 event pairs, 29 based on Foata normal form. 10/1428 useless extension candidates. Maximal degree in co-relation 9804. Up to 564 conditions per place. [2023-11-19 07:35:23,715 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 214 selfloop transitions, 129 changer transitions 21/364 dead transitions. [2023-11-19 07:35:23,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 364 transitions, 5275 flow [2023-11-19 07:35:23,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-19 07:35:23,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2023-11-19 07:35:23,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 802 transitions. [2023-11-19 07:35:23,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45361990950226244 [2023-11-19 07:35:23,724 INFO L72 ComplementDD]: Start complementDD. Operand 13 states and 802 transitions. [2023-11-19 07:35:23,724 INFO L73 IsDeterministic]: Start isDeterministic. Operand 13 states and 802 transitions. [2023-11-19 07:35:23,724 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:23,724 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 13 states and 802 transitions. [2023-11-19 07:35:23,726 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 14 states, 13 states have (on average 61.69230769230769) internal successors, (802), 13 states have internal predecessors, (802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:23,729 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:23,730 INFO L81 ComplementDD]: Finished complementDD. Result has 14 states, 14 states have (on average 136.0) internal successors, (1904), 14 states have internal predecessors, (1904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:23,730 INFO L175 Difference]: Start difference. First operand has 144 places, 241 transitions, 3107 flow. Second operand 13 states and 802 transitions. [2023-11-19 07:35:23,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 364 transitions, 5275 flow [2023-11-19 07:35:23,834 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 364 transitions, 5169 flow, removed 53 selfloop flow, removed 0 redundant places. [2023-11-19 07:35:23,843 INFO L231 Difference]: Finished difference. Result has 164 places, 303 transitions, 4449 flow [2023-11-19 07:35:23,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=3021, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=4449, PETRI_PLACES=164, PETRI_TRANSITIONS=303} [2023-11-19 07:35:23,845 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 144 predicate places. [2023-11-19 07:35:23,845 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 303 transitions, 4449 flow [2023-11-19 07:35:23,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 58.07142857142857) internal successors, (813), 14 states have internal predecessors, (813), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:23,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:23,846 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:23,873 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:24,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-19 07:35:24,053 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:24,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:24,053 INFO L85 PathProgramCache]: Analyzing trace with hash 484674421, now seen corresponding path program 11 times [2023-11-19 07:35:24,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:24,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106113745] [2023-11-19 07:35:24,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:24,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:24,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:24,181 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:24,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:24,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106113745] [2023-11-19 07:35:24,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106113745] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:24,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065331499] [2023-11-19 07:35:24,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:35:24,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:24,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:24,183 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:24,200 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-19 07:35:24,269 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:35:24,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:24,271 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:24,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:24,343 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:24,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:24,410 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:24,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065331499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:24,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:24,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2023-11-19 07:35:24,411 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385608752] [2023-11-19 07:35:24,411 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:24,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-19 07:35:24,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:24,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-19 07:35:24,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2023-11-19 07:35:24,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:24,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 303 transitions, 4449 flow. Second operand has 16 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:24,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:24,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:24,498 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:25,320 INFO L124 PetriNetUnfolderBase]: 841/1502 cut-off events. [2023-11-19 07:35:25,320 INFO L125 PetriNetUnfolderBase]: For 21763/21763 co-relation queries the response was YES. [2023-11-19 07:35:25,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11840 conditions, 1502 events. 841/1502 cut-off events. For 21763/21763 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 8201 event pairs, 75 based on Foata normal form. 16/1518 useless extension candidates. Maximal degree in co-relation 11409. Up to 557 conditions per place. [2023-11-19 07:35:25,352 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 223 selfloop transitions, 166 changer transitions 0/389 dead transitions. [2023-11-19 07:35:25,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 389 transitions, 6191 flow [2023-11-19 07:35:25,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:35:25,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:35:25,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1156 transitions. [2023-11-19 07:35:25,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4473684210526316 [2023-11-19 07:35:25,355 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1156 transitions. [2023-11-19 07:35:25,356 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1156 transitions. [2023-11-19 07:35:25,356 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:25,356 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1156 transitions. [2023-11-19 07:35:25,359 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.8421052631579) internal successors, (1156), 19 states have internal predecessors, (1156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:25,363 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 136.0) internal successors, (2720), 20 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:25,365 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 136.0) internal successors, (2720), 20 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:25,365 INFO L175 Difference]: Start difference. First operand has 164 places, 303 transitions, 4449 flow. Second operand 19 states and 1156 transitions. [2023-11-19 07:35:25,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 389 transitions, 6191 flow [2023-11-19 07:35:25,523 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 389 transitions, 6056 flow, removed 59 selfloop flow, removed 3 redundant places. [2023-11-19 07:35:25,534 INFO L231 Difference]: Finished difference. Result has 187 places, 342 transitions, 5471 flow [2023-11-19 07:35:25,535 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=4348, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=5471, PETRI_PLACES=187, PETRI_TRANSITIONS=342} [2023-11-19 07:35:25,536 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 167 predicate places. [2023-11-19 07:35:25,536 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 342 transitions, 5471 flow [2023-11-19 07:35:25,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 57.75) internal successors, (924), 16 states have internal predecessors, (924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:25,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:25,537 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:25,558 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:25,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-19 07:35:25,758 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:25,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:25,758 INFO L85 PathProgramCache]: Analyzing trace with hash -305676987, now seen corresponding path program 12 times [2023-11-19 07:35:25,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:25,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194963171] [2023-11-19 07:35:25,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:25,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:25,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:25,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:25,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194963171] [2023-11-19 07:35:25,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194963171] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:25,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2098660] [2023-11-19 07:35:25,875 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:35:25,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:25,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:25,876 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:25,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-19 07:35:25,971 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2023-11-19 07:35:25,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:25,973 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:25,974 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:26,072 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:26,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:26,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2098660] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:26,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:26,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-19 07:35:26,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621748491] [2023-11-19 07:35:26,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:26,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:26,144 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:26,144 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:26,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:26,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:26,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 342 transitions, 5471 flow. Second operand has 15 states, 15 states have (on average 57.8) internal successors, (867), 15 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:26,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:26,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:26,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:27,317 INFO L124 PetriNetUnfolderBase]: 1008/1783 cut-off events. [2023-11-19 07:35:27,318 INFO L125 PetriNetUnfolderBase]: For 32091/32091 co-relation queries the response was YES. [2023-11-19 07:35:27,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15262 conditions, 1783 events. 1008/1783 cut-off events. For 32091/32091 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 9933 event pairs, 60 based on Foata normal form. 42/1825 useless extension candidates. Maximal degree in co-relation 14781. Up to 622 conditions per place. [2023-11-19 07:35:27,357 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 136 selfloop transitions, 317 changer transitions 7/460 dead transitions. [2023-11-19 07:35:27,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 460 transitions, 8330 flow [2023-11-19 07:35:27,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-19 07:35:27,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2023-11-19 07:35:27,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1455 transitions. [2023-11-19 07:35:27,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44577205882352944 [2023-11-19 07:35:27,362 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 1455 transitions. [2023-11-19 07:35:27,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 1455 transitions. [2023-11-19 07:35:27,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:27,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 1455 transitions. [2023-11-19 07:35:27,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 60.625) internal successors, (1455), 24 states have internal predecessors, (1455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:27,371 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 136.0) internal successors, (3400), 25 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:27,373 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 136.0) internal successors, (3400), 25 states have internal predecessors, (3400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:27,373 INFO L175 Difference]: Start difference. First operand has 187 places, 342 transitions, 5471 flow. Second operand 24 states and 1455 transitions. [2023-11-19 07:35:27,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 460 transitions, 8330 flow [2023-11-19 07:35:27,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 460 transitions, 8025 flow, removed 128 selfloop flow, removed 5 redundant places. [2023-11-19 07:35:27,690 INFO L231 Difference]: Finished difference. Result has 208 places, 416 transitions, 7635 flow [2023-11-19 07:35:27,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=5270, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=256, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=7635, PETRI_PLACES=208, PETRI_TRANSITIONS=416} [2023-11-19 07:35:27,698 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 188 predicate places. [2023-11-19 07:35:27,698 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 416 transitions, 7635 flow [2023-11-19 07:35:27,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.8) internal successors, (867), 15 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:27,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:27,699 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:27,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:27,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:27,909 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:27,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:27,909 INFO L85 PathProgramCache]: Analyzing trace with hash 568063693, now seen corresponding path program 13 times [2023-11-19 07:35:27,909 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:27,909 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135043617] [2023-11-19 07:35:27,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:27,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:28,071 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:28,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:28,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135043617] [2023-11-19 07:35:28,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135043617] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:28,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378143933] [2023-11-19 07:35:28,072 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:35:28,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:28,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:28,074 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:28,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-19 07:35:28,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:28,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:28,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:28,255 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:28,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378143933] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:28,313 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:28,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-19 07:35:28,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1025911606] [2023-11-19 07:35:28,313 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:28,314 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:28,314 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:28,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:28,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:28,418 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:28,419 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 416 transitions, 7635 flow. Second operand has 15 states, 15 states have (on average 57.8) internal successors, (867), 15 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:28,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:28,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:28,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:29,518 INFO L124 PetriNetUnfolderBase]: 993/1766 cut-off events. [2023-11-19 07:35:29,518 INFO L125 PetriNetUnfolderBase]: For 32594/32594 co-relation queries the response was YES. [2023-11-19 07:35:29,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16002 conditions, 1766 events. 993/1766 cut-off events. For 32594/32594 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 10020 event pairs, 147 based on Foata normal form. 10/1776 useless extension candidates. Maximal degree in co-relation 15463. Up to 963 conditions per place. [2023-11-19 07:35:29,556 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 187 selfloop transitions, 256 changer transitions 2/445 dead transitions. [2023-11-19 07:35:29,556 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 445 transitions, 8719 flow [2023-11-19 07:35:29,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-19 07:35:29,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2023-11-19 07:35:29,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 1147 transitions. [2023-11-19 07:35:29,561 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438854489164087 [2023-11-19 07:35:29,561 INFO L72 ComplementDD]: Start complementDD. Operand 19 states and 1147 transitions. [2023-11-19 07:35:29,561 INFO L73 IsDeterministic]: Start isDeterministic. Operand 19 states and 1147 transitions. [2023-11-19 07:35:29,562 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:29,562 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 19 states and 1147 transitions. [2023-11-19 07:35:29,565 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 20 states, 19 states have (on average 60.36842105263158) internal successors, (1147), 19 states have internal predecessors, (1147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:29,570 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 20 states, 20 states have (on average 136.0) internal successors, (2720), 20 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:29,571 INFO L81 ComplementDD]: Finished complementDD. Result has 20 states, 20 states have (on average 136.0) internal successors, (2720), 20 states have internal predecessors, (2720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:29,571 INFO L175 Difference]: Start difference. First operand has 208 places, 416 transitions, 7635 flow. Second operand 19 states and 1147 transitions. [2023-11-19 07:35:29,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 445 transitions, 8719 flow [2023-11-19 07:35:29,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 445 transitions, 7434 flow, removed 438 selfloop flow, removed 19 redundant places. [2023-11-19 07:35:29,801 INFO L231 Difference]: Finished difference. Result has 209 places, 416 transitions, 6896 flow [2023-11-19 07:35:29,802 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=6352, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=255, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=6896, PETRI_PLACES=209, PETRI_TRANSITIONS=416} [2023-11-19 07:35:29,802 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 189 predicate places. [2023-11-19 07:35:29,802 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 416 transitions, 6896 flow [2023-11-19 07:35:29,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.8) internal successors, (867), 15 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:29,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:29,803 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:29,818 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:30,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:30,005 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:30,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:30,005 INFO L85 PathProgramCache]: Analyzing trace with hash -1628182429, now seen corresponding path program 14 times [2023-11-19 07:35:30,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:30,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629956861] [2023-11-19 07:35:30,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:30,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:30,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:30,184 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:30,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:30,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629956861] [2023-11-19 07:35:30,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629956861] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:30,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661102514] [2023-11-19 07:35:30,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:30,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:30,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:30,187 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:30,191 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-19 07:35:30,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:30,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:30,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:30,282 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:30,390 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:30,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:30,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:30,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661102514] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:30,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:30,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 15 [2023-11-19 07:35:30,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638653736] [2023-11-19 07:35:30,456 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:30,456 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:30,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:30,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:30,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:30,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:30,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 416 transitions, 6896 flow. Second operand has 15 states, 15 states have (on average 58.06666666666667) internal successors, (871), 15 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:30,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:30,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:30,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:31,595 INFO L124 PetriNetUnfolderBase]: 1101/1972 cut-off events. [2023-11-19 07:35:31,595 INFO L125 PetriNetUnfolderBase]: For 27617/27617 co-relation queries the response was YES. [2023-11-19 07:35:31,610 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16255 conditions, 1972 events. 1101/1972 cut-off events. For 27617/27617 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 11454 event pairs, 71 based on Foata normal form. 26/1998 useless extension candidates. Maximal degree in co-relation 15733. Up to 583 conditions per place. [2023-11-19 07:35:31,624 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 226 selfloop transitions, 271 changer transitions 6/503 dead transitions. [2023-11-19 07:35:31,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 503 transitions, 8871 flow [2023-11-19 07:35:31,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2023-11-19 07:35:31,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2023-11-19 07:35:31,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 1274 transitions. [2023-11-19 07:35:31,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44607843137254904 [2023-11-19 07:35:31,630 INFO L72 ComplementDD]: Start complementDD. Operand 21 states and 1274 transitions. [2023-11-19 07:35:31,630 INFO L73 IsDeterministic]: Start isDeterministic. Operand 21 states and 1274 transitions. [2023-11-19 07:35:31,631 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:31,632 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 21 states and 1274 transitions. [2023-11-19 07:35:31,634 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 22 states, 21 states have (on average 60.666666666666664) internal successors, (1274), 21 states have internal predecessors, (1274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:31,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 22 states, 22 states have (on average 136.0) internal successors, (2992), 22 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:31,640 INFO L81 ComplementDD]: Finished complementDD. Result has 22 states, 22 states have (on average 136.0) internal successors, (2992), 22 states have internal predecessors, (2992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:31,640 INFO L175 Difference]: Start difference. First operand has 209 places, 416 transitions, 6896 flow. Second operand 21 states and 1274 transitions. [2023-11-19 07:35:31,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 503 transitions, 8871 flow [2023-11-19 07:35:31,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 503 transitions, 8319 flow, removed 5 selfloop flow, removed 17 redundant places. [2023-11-19 07:35:31,926 INFO L231 Difference]: Finished difference. Result has 217 places, 454 transitions, 7814 flow [2023-11-19 07:35:31,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=6398, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=416, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=230, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=7814, PETRI_PLACES=217, PETRI_TRANSITIONS=454} [2023-11-19 07:35:31,927 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 197 predicate places. [2023-11-19 07:35:31,927 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 454 transitions, 7814 flow [2023-11-19 07:35:31,928 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 58.06666666666667) internal successors, (871), 15 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:31,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:31,928 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:31,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:32,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:32,128 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:32,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:32,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1026399885, now seen corresponding path program 15 times [2023-11-19 07:35:32,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:32,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553237540] [2023-11-19 07:35:32,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:32,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:32,239 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:32,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553237540] [2023-11-19 07:35:32,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553237540] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:32,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311685752] [2023-11-19 07:35:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-19 07:35:32,241 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:32,241 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:32,242 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:32,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-19 07:35:32,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-19 07:35:32,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:32,334 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:32,335 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:32,427 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:32,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:32,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311685752] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:32,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:32,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 15 [2023-11-19 07:35:32,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063948097] [2023-11-19 07:35:32,490 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:32,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-19 07:35:32,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:32,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-19 07:35:32,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2023-11-19 07:35:32,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:32,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 454 transitions, 7814 flow. Second operand has 15 states, 15 states have (on average 57.86666666666667) internal successors, (868), 15 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:32,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:32,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:32,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:33,874 INFO L124 PetriNetUnfolderBase]: 1463/2612 cut-off events. [2023-11-19 07:35:33,874 INFO L125 PetriNetUnfolderBase]: For 40783/40783 co-relation queries the response was YES. [2023-11-19 07:35:33,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22219 conditions, 2612 events. 1463/2612 cut-off events. For 40783/40783 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 16081 event pairs, 65 based on Foata normal form. 34/2646 useless extension candidates. Maximal degree in co-relation 21633. Up to 711 conditions per place. [2023-11-19 07:35:33,919 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 177 selfloop transitions, 488 changer transitions 7/672 dead transitions. [2023-11-19 07:35:33,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 672 transitions, 12539 flow [2023-11-19 07:35:33,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-19 07:35:33,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2023-11-19 07:35:33,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 1571 transitions. [2023-11-19 07:35:34,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44428733031674206 [2023-11-19 07:35:34,022 INFO L72 ComplementDD]: Start complementDD. Operand 26 states and 1571 transitions. [2023-11-19 07:35:34,022 INFO L73 IsDeterministic]: Start isDeterministic. Operand 26 states and 1571 transitions. [2023-11-19 07:35:34,023 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:34,023 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 26 states and 1571 transitions. [2023-11-19 07:35:34,026 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 27 states, 26 states have (on average 60.42307692307692) internal successors, (1571), 26 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:34,038 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 27 states, 27 states have (on average 136.0) internal successors, (3672), 27 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:34,040 INFO L81 ComplementDD]: Finished complementDD. Result has 27 states, 27 states have (on average 136.0) internal successors, (3672), 27 states have internal predecessors, (3672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:34,040 INFO L175 Difference]: Start difference. First operand has 217 places, 454 transitions, 7814 flow. Second operand 26 states and 1571 transitions. [2023-11-19 07:35:34,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 672 transitions, 12539 flow [2023-11-19 07:35:34,324 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 672 transitions, 12256 flow, removed 83 selfloop flow, removed 10 redundant places. [2023-11-19 07:35:34,338 INFO L231 Difference]: Finished difference. Result has 242 places, 618 transitions, 12033 flow [2023-11-19 07:35:34,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=7605, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=12033, PETRI_PLACES=242, PETRI_TRANSITIONS=618} [2023-11-19 07:35:34,339 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 222 predicate places. [2023-11-19 07:35:34,339 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 618 transitions, 12033 flow [2023-11-19 07:35:34,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 57.86666666666667) internal successors, (868), 15 states have internal predecessors, (868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:34,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:34,340 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:34,354 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:34,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:34,542 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:34,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:34,543 INFO L85 PathProgramCache]: Analyzing trace with hash -298048501, now seen corresponding path program 16 times [2023-11-19 07:35:34,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:34,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795904334] [2023-11-19 07:35:34,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:34,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:34,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:34,699 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:34,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:34,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795904334] [2023-11-19 07:35:34,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795904334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:34,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1421536543] [2023-11-19 07:35:34,700 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-19 07:35:34,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:34,701 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:34,701 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:34,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-19 07:35:34,793 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-19 07:35:34,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:34,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:34,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:34,892 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:34,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:34,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1421536543] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:34,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:34,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 18 [2023-11-19 07:35:34,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667798129] [2023-11-19 07:35:34,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:34,974 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-19 07:35:34,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:34,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-19 07:35:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-19 07:35:35,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:35,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 618 transitions, 12033 flow. Second operand has 18 states, 18 states have (on average 57.94444444444444) internal successors, (1043), 18 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:35,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:35,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:35,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:36,889 INFO L124 PetriNetUnfolderBase]: 1640/2941 cut-off events. [2023-11-19 07:35:36,889 INFO L125 PetriNetUnfolderBase]: For 53572/53572 co-relation queries the response was YES. [2023-11-19 07:35:36,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27557 conditions, 2941 events. 1640/2941 cut-off events. For 53572/53572 co-relation queries the response was YES. Maximal size of possible extension queue 234. Compared 18771 event pairs, 140 based on Foata normal form. 10/2951 useless extension candidates. Maximal degree in co-relation 26919. Up to 1030 conditions per place. [2023-11-19 07:35:36,937 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 394 selfloop transitions, 369 changer transitions 2/765 dead transitions. [2023-11-19 07:35:36,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 765 transitions, 15946 flow [2023-11-19 07:35:36,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-19 07:35:36,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2023-11-19 07:35:36,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 1753 transitions. [2023-11-19 07:35:36,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44447261663286003 [2023-11-19 07:35:36,943 INFO L72 ComplementDD]: Start complementDD. Operand 29 states and 1753 transitions. [2023-11-19 07:35:36,943 INFO L73 IsDeterministic]: Start isDeterministic. Operand 29 states and 1753 transitions. [2023-11-19 07:35:36,944 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:36,945 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 29 states and 1753 transitions. [2023-11-19 07:35:36,949 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 30 states, 29 states have (on average 60.44827586206897) internal successors, (1753), 29 states have internal predecessors, (1753), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:36,961 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 30 states, 30 states have (on average 136.0) internal successors, (4080), 30 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:36,962 INFO L81 ComplementDD]: Finished complementDD. Result has 30 states, 30 states have (on average 136.0) internal successors, (4080), 30 states have internal predecessors, (4080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:36,962 INFO L175 Difference]: Start difference. First operand has 242 places, 618 transitions, 12033 flow. Second operand 29 states and 1753 transitions. [2023-11-19 07:35:36,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 765 transitions, 15946 flow [2023-11-19 07:35:37,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 765 transitions, 15266 flow, removed 256 selfloop flow, removed 10 redundant places. [2023-11-19 07:35:37,553 INFO L231 Difference]: Finished difference. Result has 265 places, 699 transitions, 14106 flow [2023-11-19 07:35:37,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=11435, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=618, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=290, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=14106, PETRI_PLACES=265, PETRI_TRANSITIONS=699} [2023-11-19 07:35:37,554 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 245 predicate places. [2023-11-19 07:35:37,555 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 699 transitions, 14106 flow [2023-11-19 07:35:37,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 57.94444444444444) internal successors, (1043), 18 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:37,555 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:37,556 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:37,580 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-19 07:35:37,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:37,769 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:37,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:37,770 INFO L85 PathProgramCache]: Analyzing trace with hash -188183545, now seen corresponding path program 17 times [2023-11-19 07:35:37,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:37,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260634116] [2023-11-19 07:35:37,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:37,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:37,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 1 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:37,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260634116] [2023-11-19 07:35:37,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260634116] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:37,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441455911] [2023-11-19 07:35:37,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-19 07:35:37,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:37,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:37,934 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:37,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-19 07:35:38,028 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2023-11-19 07:35:38,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:38,030 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:38,031 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:38,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:38,244 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:38,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441455911] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:38,245 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:38,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-19 07:35:38,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276022570] [2023-11-19 07:35:38,245 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:38,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:35:38,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:38,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:35:38,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:35:38,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:38,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 699 transitions, 14106 flow. Second operand has 20 states, 20 states have (on average 57.9) internal successors, (1158), 20 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:38,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:38,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:38,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:41,436 INFO L124 PetriNetUnfolderBase]: 2423/4340 cut-off events. [2023-11-19 07:35:41,436 INFO L125 PetriNetUnfolderBase]: For 85607/85607 co-relation queries the response was YES. [2023-11-19 07:35:41,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41630 conditions, 4340 events. 2423/4340 cut-off events. For 85607/85607 co-relation queries the response was YES. Maximal size of possible extension queue 332. Compared 29644 event pairs, 137 based on Foata normal form. 32/4372 useless extension candidates. Maximal degree in co-relation 40957. Up to 1189 conditions per place. [2023-11-19 07:35:41,533 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 341 selfloop transitions, 757 changer transitions 10/1108 dead transitions. [2023-11-19 07:35:41,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 1108 transitions, 24336 flow [2023-11-19 07:35:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-19 07:35:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2023-11-19 07:35:41,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2173 transitions. [2023-11-19 07:35:41,541 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4438316993464052 [2023-11-19 07:35:41,541 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2173 transitions. [2023-11-19 07:35:41,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2173 transitions. [2023-11-19 07:35:41,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:41,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2173 transitions. [2023-11-19 07:35:41,550 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 60.361111111111114) internal successors, (2173), 36 states have internal predecessors, (2173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:41,559 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 136.0) internal successors, (5032), 37 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:41,561 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 136.0) internal successors, (5032), 37 states have internal predecessors, (5032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:41,562 INFO L175 Difference]: Start difference. First operand has 265 places, 699 transitions, 14106 flow. Second operand 36 states and 2173 transitions. [2023-11-19 07:35:41,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 1108 transitions, 24336 flow [2023-11-19 07:35:42,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 1108 transitions, 23647 flow, removed 296 selfloop flow, removed 6 redundant places. [2023-11-19 07:35:42,747 INFO L231 Difference]: Finished difference. Result has 306 places, 1031 transitions, 23510 flow [2023-11-19 07:35:42,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=13754, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=442, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=23510, PETRI_PLACES=306, PETRI_TRANSITIONS=1031} [2023-11-19 07:35:42,748 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 286 predicate places. [2023-11-19 07:35:42,748 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 1031 transitions, 23510 flow [2023-11-19 07:35:42,749 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.9) internal successors, (1158), 20 states have internal predecessors, (1158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:42,749 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:42,749 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:42,770 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:42,970 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-19 07:35:42,970 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:42,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:42,970 INFO L85 PathProgramCache]: Analyzing trace with hash 662920721, now seen corresponding path program 18 times [2023-11-19 07:35:42,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:42,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972206821] [2023-11-19 07:35:42,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:42,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:43,083 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:43,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:43,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972206821] [2023-11-19 07:35:43,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972206821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:43,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981937437] [2023-11-19 07:35:43,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-19 07:35:43,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:43,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:43,085 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:43,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-19 07:35:43,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2023-11-19 07:35:43,172 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:43,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:43,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:43,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:43,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:43,332 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:43,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1981937437] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:43,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:43,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 20 [2023-11-19 07:35:43,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172788100] [2023-11-19 07:35:43,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:43,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-19 07:35:43,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:43,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-19 07:35:43,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=287, Unknown=0, NotChecked=0, Total=380 [2023-11-19 07:35:43,444 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:43,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 1031 transitions, 23510 flow. Second operand has 20 states, 20 states have (on average 57.55) internal successors, (1151), 20 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:43,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:43,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:43,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:46,450 INFO L124 PetriNetUnfolderBase]: 2490/4449 cut-off events. [2023-11-19 07:35:46,450 INFO L125 PetriNetUnfolderBase]: For 106391/106391 co-relation queries the response was YES. [2023-11-19 07:35:46,502 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45923 conditions, 4449 events. 2490/4449 cut-off events. For 106391/106391 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 30315 event pairs, 673 based on Foata normal form. 60/4509 useless extension candidates. Maximal degree in co-relation 45245. Up to 3951 conditions per place. [2023-11-19 07:35:46,532 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 994 selfloop transitions, 141 changer transitions 11/1146 dead transitions. [2023-11-19 07:35:46,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 1146 transitions, 27763 flow [2023-11-19 07:35:46,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-19 07:35:46,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 30 states. [2023-11-19 07:35:46,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 1822 transitions. [2023-11-19 07:35:46,540 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4465686274509804 [2023-11-19 07:35:46,540 INFO L72 ComplementDD]: Start complementDD. Operand 30 states and 1822 transitions. [2023-11-19 07:35:46,540 INFO L73 IsDeterministic]: Start isDeterministic. Operand 30 states and 1822 transitions. [2023-11-19 07:35:46,541 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:46,542 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 30 states and 1822 transitions. [2023-11-19 07:35:46,546 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 31 states, 30 states have (on average 60.733333333333334) internal successors, (1822), 30 states have internal predecessors, (1822), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:46,553 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 31 states, 31 states have (on average 136.0) internal successors, (4216), 31 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:46,554 INFO L81 ComplementDD]: Finished complementDD. Result has 31 states, 31 states have (on average 136.0) internal successors, (4216), 31 states have internal predecessors, (4216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:46,554 INFO L175 Difference]: Start difference. First operand has 306 places, 1031 transitions, 23510 flow. Second operand 30 states and 1822 transitions. [2023-11-19 07:35:46,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 1146 transitions, 27763 flow [2023-11-19 07:35:48,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 325 places, 1146 transitions, 27219 flow, removed 226 selfloop flow, removed 10 redundant places. [2023-11-19 07:35:48,072 INFO L231 Difference]: Finished difference. Result has 342 places, 1086 transitions, 25038 flow [2023-11-19 07:35:48,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=22980, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1031, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=936, PETRI_DIFFERENCE_SUBTRAHEND_STATES=30, PETRI_FLOW=25038, PETRI_PLACES=342, PETRI_TRANSITIONS=1086} [2023-11-19 07:35:48,074 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 322 predicate places. [2023-11-19 07:35:48,074 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 1086 transitions, 25038 flow [2023-11-19 07:35:48,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 57.55) internal successors, (1151), 20 states have internal predecessors, (1151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:48,075 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:48,075 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:48,102 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2023-11-19 07:35:48,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-19 07:35:48,289 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:48,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:48,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1172568247, now seen corresponding path program 19 times [2023-11-19 07:35:48,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:48,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427710065] [2023-11-19 07:35:48,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:48,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:48,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:48,393 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:48,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:48,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427710065] [2023-11-19 07:35:48,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427710065] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:48,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [282582165] [2023-11-19 07:35:48,394 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-19 07:35:48,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:48,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:48,395 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:48,405 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-19 07:35:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:48,474 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-19 07:35:48,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:48,572 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:48,572 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [282582165] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:48,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:48,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 7] total 17 [2023-11-19 07:35:48,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404792540] [2023-11-19 07:35:48,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:48,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-19 07:35:48,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:48,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-19 07:35:48,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-19 07:35:48,721 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 56 out of 136 [2023-11-19 07:35:48,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 1086 transitions, 25038 flow. Second operand has 17 states, 17 states have (on average 57.76470588235294) internal successors, (982), 17 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:48,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:48,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 56 of 136 [2023-11-19 07:35:48,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:51,036 INFO L124 PetriNetUnfolderBase]: 2496/4434 cut-off events. [2023-11-19 07:35:51,036 INFO L125 PetriNetUnfolderBase]: For 96413/96413 co-relation queries the response was YES. [2023-11-19 07:35:51,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45587 conditions, 4434 events. 2496/4434 cut-off events. For 96413/96413 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 29974 event pairs, 686 based on Foata normal form. 6/4440 useless extension candidates. Maximal degree in co-relation 45055. Up to 4069 conditions per place. [2023-11-19 07:35:51,117 INFO L140 encePairwiseOnDemand]: 130/136 looper letters, 985 selfloop transitions, 135 changer transitions 5/1125 dead transitions. [2023-11-19 07:35:51,118 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 1125 transitions, 27899 flow [2023-11-19 07:35:51,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-19 07:35:51,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2023-11-19 07:35:51,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 966 transitions. [2023-11-19 07:35:51,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44393382352941174 [2023-11-19 07:35:51,121 INFO L72 ComplementDD]: Start complementDD. Operand 16 states and 966 transitions. [2023-11-19 07:35:51,122 INFO L73 IsDeterministic]: Start isDeterministic. Operand 16 states and 966 transitions. [2023-11-19 07:35:51,122 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:51,123 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 16 states and 966 transitions. [2023-11-19 07:35:51,125 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 17 states, 16 states have (on average 60.375) internal successors, (966), 16 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:51,129 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:51,130 INFO L81 ComplementDD]: Finished complementDD. Result has 17 states, 17 states have (on average 136.0) internal successors, (2312), 17 states have internal predecessors, (2312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:51,130 INFO L175 Difference]: Start difference. First operand has 342 places, 1086 transitions, 25038 flow. Second operand 16 states and 966 transitions. [2023-11-19 07:35:51,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 1125 transitions, 27899 flow [2023-11-19 07:35:52,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 1125 transitions, 26448 flow, removed 630 selfloop flow, removed 7 redundant places. [2023-11-19 07:35:52,929 INFO L231 Difference]: Finished difference. Result has 350 places, 1099 transitions, 24263 flow [2023-11-19 07:35:52,930 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=136, PETRI_DIFFERENCE_MINUEND_FLOW=23685, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1083, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=963, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=24263, PETRI_PLACES=350, PETRI_TRANSITIONS=1099} [2023-11-19 07:35:52,930 INFO L281 CegarLoopForPetriNet]: 20 programPoint places, 330 predicate places. [2023-11-19 07:35:52,931 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 1099 transitions, 24263 flow [2023-11-19 07:35:52,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 57.76470588235294) internal successors, (982), 17 states have internal predecessors, (982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:52,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2023-11-19 07:35:52,931 INFO L208 CegarLoopForPetriNet]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 07:35:52,950 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-19 07:35:53,132 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-19 07:35:53,132 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2023-11-19 07:35:53,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 07:35:53,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1174976674, now seen corresponding path program 20 times [2023-11-19 07:35:53,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-19 07:35:53,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172994390] [2023-11-19 07:35:53,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 07:35:53,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 07:35:53,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 07:35:53,245 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-19 07:35:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-19 07:35:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172994390] [2023-11-19 07:35:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172994390] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 07:35:53,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939637677] [2023-11-19 07:35:53,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-19 07:35:53,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 07:35:53,246 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 [2023-11-19 07:35:53,249 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 07:35:53,273 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_2f73a5e8-4528-4b2d-8d8c-ceccbcbd638d/bin/uautomizer-verify-uCwYo4JHxu/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-19 07:35:53,347 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-19 07:35:53,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-19 07:35:53,348 INFO L262 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-19 07:35:53,350 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 07:35:53,408 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:53,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 07:35:53,487 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 07:35:53,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939637677] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 07:35:53,488 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-19 07:35:53,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2023-11-19 07:35:53,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607617284] [2023-11-19 07:35:53,488 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-19 07:35:53,489 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-19 07:35:53,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-19 07:35:53,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-19 07:35:53,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-19 07:35:53,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 67 out of 136 [2023-11-19 07:35:53,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 1099 transitions, 24263 flow. Second operand has 10 states, 10 states have (on average 70.2) internal successors, (702), 10 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:53,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2023-11-19 07:35:53,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 67 of 136 [2023-11-19 07:35:53,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2023-11-19 07:35:57,530 INFO L124 PetriNetUnfolderBase]: 3371/5946 cut-off events. [2023-11-19 07:35:57,530 INFO L125 PetriNetUnfolderBase]: For 113821/113821 co-relation queries the response was YES. [2023-11-19 07:35:57,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57991 conditions, 5946 events. 3371/5946 cut-off events. For 113821/113821 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 42131 event pairs, 137 based on Foata normal form. 7/5953 useless extension candidates. Maximal degree in co-relation 56900. Up to 3556 conditions per place. [2023-11-19 07:35:57,698 INFO L140 encePairwiseOnDemand]: 132/136 looper letters, 1011 selfloop transitions, 452 changer transitions 134/1597 dead transitions. [2023-11-19 07:35:57,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 1597 transitions, 37839 flow [2023-11-19 07:35:57,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-19 07:35:57,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2023-11-19 07:35:57,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 465 transitions. [2023-11-19 07:35:57,700 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5698529411764706 [2023-11-19 07:35:57,700 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 465 transitions. [2023-11-19 07:35:57,700 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 465 transitions. [2023-11-19 07:35:57,700 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2023-11-19 07:35:57,700 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 465 transitions. [2023-11-19 07:35:57,701 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 77.5) internal successors, (465), 6 states have internal predecessors, (465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:57,703 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:57,703 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 136.0) internal successors, (952), 7 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-19 07:35:57,704 INFO L175 Difference]: Start difference. First operand has 350 places, 1099 transitions, 24263 flow. Second operand 6 states and 465 transitions. [2023-11-19 07:35:57,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 1597 transitions, 37839 flow